General Information

Serial #

N/A

Part Number

1

Total Parts

2

AKA

N/A

Patents

N/A

General Description

SYNTHETIC RULE AND CASE.

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length

N/A

Width

N/A

Height

N/A

Thickness

N/A

Weight

N/A

Diameter

14.4 cm

Volume

N/A

Lexicon

Group

Physics

Category

Atomic & nuclear

Sub-Category

N/A

Manufacturer

AKA

Nuclear Chicago

Country

United States of America

State/Province

Illinois

City

Des Plaines

Context

Country

Canada

State/Province

Quebec

Period

THIS SLIDE RULE PRESUMABLY USED MID-1960S TO 1970S.

Canada

USED IN MONTREAL, PQ MEDICAL PRACTICE OF DR. ROGER GHYS TO DETERMINE DOSAGE LEVELS FOR RADIATION AND BRACHYTHERAPY TREATMENTS, AND FOR TESTING THE STANDARDS OF HIS EQUIPMENT.

Function

USED TO CALCULATE FACTORS AFFECTING MEASUREMENTS OF RADIOACTIVITY.

Technical

USED TO CALCULATE COUNTS PER MINUTE, PROBABLE ERROR, COINCIDENCE LOSS, DECAY OF ACTIVITY, ETC. AS RELATED TO MEASUREMENTS OF RADIOACTIVITY. THESE CALCULATIONS ARE ROUTINELY MADE WHEN WORKING WITHSTANDARD RADIATION DETECTION INSTRUMENTS.

Area Notes

Unknown

Details

Markings

Markings on face include "ACTIVITY", "COUNTS/MINUTE", "NUMBER 1/2 LIVES", "COINCIDENCE LOSS (%)" and "RESOLUTION LOSS" scales, and "nuclearule/ [logo]/ NUCLEAR-CHICAGO/ INSTRUCTIONS/ 1. Set black arrow to COUNTS/MINUTE./ 2. Read COINCIDENCE LOSS opposite/ RESOLUTION TIME./ 3. For further uses and further information/ consult instruction manual./ Copyright 1949 Nuclear-Chicago Corp.". Marking on reverse include "REGISTER READING", "SCALE FACTOR", "PROBABILITY (%)", "FRACTIONAL ERROR (%)", "COUNTS PER MINUTE" and "TIME (Minutes)" scales, and "INSTRUCTIONS". Instructions printed on one side of slide rule appear as follows: "INSTRUCTIONS/ 1. Set SCALE FACTOR of scaler used opposite REGISTER/ READING./ 2. Read COUNTS PER MINUTE opposite TIME (minutes)./ If circle below is black, use small K's./ 3. Read FRACTIONAL ERROR corresponding to Probable Error, Standard Error, or Reliable Error./ Fro more details and further information consult instruction/ manual. ". "k CIRCLE" printed, below.

Missing

NONE.

Finish

WHITE AND OPAQUE SYNTHETIC CIRCULAR SLIDE RULE BEARS RED AND BLACK TEXT AND MARKINGS.

Decoration

N/A